A hacker let AI agents loose on the web. They broke into 100+ sites for about $50 each

A researcher reports that a swarm of autonomous AI agents managed to compromise more than 100 websites, spending roughly $5,000 on model usage in total. That works out to around $50 per successful break-in.

The number that matters is the price. Attacks that once needed a skilled human working for days can now be run in bulk by software, which shifts the economics heavily toward attackers.

For site owners the takeaway is familiar but more urgent: patch quickly, lock down admin panels, and assume automated probing is constant rather than occasional.